It turns out that Calderbank has some pretty strident views on what Jews are allowed to call antisemitism and whether Jews living in the West Bank should expect to be killed. Here is a selection of his own words;

if that happens it’s utterly wrong – but also the product of dispossession and oppression

But his fiance, who also happens to be on Labour’s powerful ‘conference arrangement committee’, can’t possibly share his views…

@TwiitterJo Oh is it? That makes sense as I live close to the ‘Tottenham Jewish Quarter’ — Seema Chandwani ™ (@SeemaChandwani) December 1, 2013

Update:

The one you cited makes an argument advanced by a number of Jewish scholars and is in no way antisemitic. It’s critical of the Israeli state. BIG difference. Doesn’t diminish very real need to mourn and remember the Shoah.

So you are judge, jury and executioner? Twitter is not an ideal medium to discuss the complexities of the instrumentalisation of memory vs the very genuine need to mourn terrible suffering. For any unintended offence I may have caused I apologise. — Michael Calderbank (@Calderbank) February 7, 2018